text: # This file is part of Buildbot.  Buildbot is free software: you can
  # redistribute it and/or modify it under the terms of the GNU General Public
  # License as published by the Free Software Foundation, version 2.
  #
  # This program is distributed in the hope that it will be useful, but WITHOUT
  # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
  # FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
  # details.
  #
  # You should have received a copy of the GNU General Public License along with
  # this program; if not, write to the Free Software Foundation, Inc., 51
  # Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  #
  # Copyright Buildbot Team Members
  
  import os
  import mock
  from twisted.trial import unittest
  from twisted.internet import defer
  from buildbot.db import model, enginestrategy
  from buildbot.test.util import db
  
  class DBConnector_Basic(db.RealDatabaseMixin, unittest.TestCase):
      """
      Basic tests of the DBConnector class - all start with an empty DB
      """
  
      def setUp(self):
          d = self.setUpRealDatabase()
          def make_fake_pool(_):
              engine = enginestrategy.create_engine(self.db_url,
                          basedir=os.path.abspath('basedir'))
  
              # mock out the pool, and set up the model
              self.db = mock.Mock()
              self.db.pool.do_with_engine = lambda thd : defer.maybeDeferred(thd,engine)
              self.db.model = model.Model(self.db)
              self.db.start()
          d.addCallback(make_fake_pool)
          return d
  
      def tearDown(self):
          self.db.stop()
          return self.tearDownRealDatabase()
  
      def test_is_current_empty(self):
          d = self.db.model.is_current()
          d.addCallback(lambda r : self.assertFalse(r))
          return d
  
      def test_is_current_full(self):
          d = self.db.model.upgrade()
          d.addCallback(lambda _ : self.db.model.is_current())
          d.addCallback(lambda r : self.assertTrue(r))
          return d
  
      # the upgrade method is very well-tested by the integration tests; the
      # remainder of the object is just tables.
  